Journal of Propulsion Technology ›› 2020, Vol. 41 ›› Issue (5): 1023-1030.DOI: 10.13675/j.cnki.tjjs.190183

• Aero-thermodynamics • Previous Articles     Next Articles

Parameterization and Optimization for Variable Cross-Sections Bend Isolator

  

  1. College of Aerospace Science, National University of Defense Technology, Changsha 410073, China
  • Published:2021-08-15

弯曲变截面隔离段参数化设计与优化

陈镜帆1,范晓樯1,蒙泽威1,熊冰1,王翼1   

  1. 国防科技大学 空天科学学院,湖南 长沙 410073
  • 作者简介:陈镜帆,硕士生,研究领域为高超声速推进技术。E-mail:chenjingfan97@foxmail.com
  • 基金资助:
    国家自然科学基金(11572347;11872071)。

Abstract: In order to improve aerodynamic performance of a specific variable cross-sections bend isolator, a parameterization and optimization method based on the shape blending function was developed. In order to increase the types of configuration generated by the shape blending function, a novel discretization memology based on geometric length was proposed. To meet the requirement of off-set and flexibility, B-spline curve was utilized for the off-set line design. Using the built-in global algorithm of the optimization software Isight, the total pressure recovery coefficient of the exit of a specific bend isolation section was targeted to optimize. It was found that the total pressure recovery coefficient of the optimized configuration was 12.3% higher than that of the original configuration given the same flow inlet condition.

Key words: Scramjet;Isolator;Shape blending;Aerodynamic performance;Shock train;Parameter optimization

摘要: 为了提高弯曲变截面隔离段的气动性能,发展了基于几何融合的参数化设计与优化方法。为了丰富几何融合方法产生构型的种类,提出了基于几何长度的新型离散化方法。为满足偏置要求及灵活性要求,中心线设计时选用了B样条曲线。利用优化软件Isight内置全局算法,针对某隔离段,以弯曲隔离段出口的总压恢复系数为目标进行了优化求解。结果表明:优化构型相对于原始构型,在给定相同来流入口情况下总压恢复系数提高了12.3%。

关键词: 超燃冲压发动机;隔离段;几何融合;气动性能;激波串;参数优化